gaokao 2015 Q9

gaokao · China · tianjin-arts Complex Numbers Arithmetic Complex Division/Multiplication Simplification

9. $i$ is the imaginary unit. Calculate $\frac { 1 - 2 i } { 2 + i }$ and the result is $\_\_\_\_$.

9. $i$ is the imaginary unit. Calculate $\frac { 1 - 2 i } { 2 + i }$ and the result is $\_\_\_\_$.\\